KSN Server Unavailable

[Hamid Ali]

Dear Support, Greetings, In a network, there are more than 70% devices with continuous error "KSN Server Unavailable". Following things have been performed as a troubleshooting:

1. I have recreated the policies for all KES versions.
2. I have disabled and then enabled KSC component.
3. I have checked KSN connection from KSC Administration Server properties option which in connected perfectly.
4. I have also disabled USE KSN PROXY option from KES policies but still no effect.
5. I also disabled PROXY setting from KES 11.

Also kindly confirm that client devices share KSN data with Kaspersky Lab or with KSC Server ? KSC is upgraded to version 11 but previously when KSC 10.5 was being used, same error was prompting on majority of devices. Waiting for your cooperation as usual. Thanks KES Versions: KES 11 KES 10 SP2 KES 10 SP1 MR2

[Konstantin Antonov]

HI, Do you use any network filtration software on hardware in your environment? What KES 11 version do you use? Thank you!

[Hamid Ali]

HI, Do you use any network filtration software on hardware in your environment? What KES 11 version do you use? Thank you!

Dear Konstantin, Thanks for your response. Firewall is being used in the environment.

KES 11.0.1.90

KES 11.0.0.6499

KES 10 SP2

KES 10 SP1 MR2

Thanks

[Hamid Ali]

HI, Do you use any network filtration software on hardware in your environment? What KES 11 version do you use? Thank you!

Also i have telnet the port 13111 from affected device and it is successfully connecting with KSC server.

[Hamid Ali]

Dear Support, Waiting for your kind response. Thanks

[Hamid Ali]

Dear Konstantin, Kindly guide on this issue. Waiting for your response. Thanks

[Nikolay Arinchev]

Hi, Could you please provide us with GSI reports both from KSC and from one of affected hosts? Thank you!

[KarDip]

Hi Hamid Ali Welcome to the new Kaspersky Community. As well as all above posts. You could try running the "klnagchk.exe tool" Then take a look at the log. https://support.kaspersky.com/12776#block1 Thank you.

[Sutsswan]

I've had a similar situation and I want to saythat using a proper vpn protection can solve your problem (if studied thoroughly). https://cooltechzone.com/free-vpn is just a single example of service that can be used and actually works.